- Page of resources, for first-time GMs and players – includes links to Actual Play posts, videos and podcasts
- The Enchiridion of Elucidation, a guidebook for both players and Keepers, with advice on playing the game by Tony Williams
- Creating an investigator – by Jason Durall
You have to keep the doors to the Outside from swinging open – no matter what the cost in life or sanity. You have to go wherever the answers are, and do what needs to be done to protect humanity. But do you dare to follow… the trail of Cthulhu?